Biomechanism hanau ma nāʻano o ka previa

Biomechanism ka nahunahu hanau - he okoa kau o okoa ka neʻe 'ana, a i hele ma ka hua hānau Canal makuwahine. Mau hana i pololei e pili ana i ka 'ole o ka wahine pelvis. Ka mea, e moe ana ma ka flexion / hoʻopaneʻe o ke poo o ke keiki, ka mea, ua ke ka ao ka puni ka iho (axis), ke kīloi paʻewa declination fetal poo a me ka pendulum neʻe pahuna ma kona holomua ma ka hanau ana Canal.

A pau kēia mau hana i hoomakaukau i ka nui a me ke kinona o ka pelvis wahine, i ke alo o amniotic loli i ka ai lawa ku syrovidnoy oil, i uhi kino i ke keiki i ka, a ho'ēmi i kā kū'ē like hoʻi me ka nui a me ka kinona o ka fetal poo. Eia hou, ke haawi ua hoakaka biomechanism uterine haʻawina, nui kaʻoi loa, kona contractions. Kēia hana he translational ana no ka paipai 'ana i fetal mai maternal hanau Canal. An hou ololi e ka poʻea pau i ka ka ho'ēmiʻana o ka uterus, o kona ligaments. Ma keia hihia, i ka puni ligaments tighten uterine lalo, alo, a me ka sacrouterine - hoopaa, paleʻauana, a koho ia ma luna o ka ili o ka sacrum.

Biomechanism hanau ma ke poo fetal hōʻike (occipital) oia no ke kēia mau hehee wale: anuenue poo a me kona gradual kaolo i loko o ka pelvic lua. I ka anuenue poʻo me ka nānā 'ana i nā alakaʻi oʻoi - Small fontanelle, i mea kokoke i ka pelvis ua hoʻouwea laina. He kēia wahi, a ma laila mea i ka mua o ka wahine slit. Ke chin o ka fetus i ka mea ia manawa i hana 'ia ai i ka pahu. I ka hoʻomaka o ke poo hoʻololi kona hoʻonohonohoʻia. Eia, hele ka wā mai i ka palahalaha a hiki i kekahi wahi paiki hapa o ka pelvic ia hana he coup. Hope a ke kanaka ua kuhikuhi 'ana i ka sacrum a me ka hope o ke poʻo a hiki i ka symphysis. A me ka hope, aia ka palena manawa no ka poo a me kona OAAIeOO, mai ka pelane o na pelvis - ua hanau i ka lae, a me ka maka chin hope. i ka hanau ana o ke poo ma hope i kona kikokikona kulana. Hou hanau poʻohiwi, a hele mai piha expulsion o ka fetus.

Biomechanism hana me ka breech hōʻike nō hoʻi ka loaʻa o rotational a me ka translational mau kuko, akā, ma kēia hihia o ka fetus hele ma ka hanau Canal pelvis mua. A hiki aku keia mea i ke kumu o alakai mezhvertilnaya gluteal laina. Aia nō ka mea kēia mau mea nui aha biomechanism genera: e hookomoia na lākou kīkala i loko o ka pelvis, a neʻe maluna, fetal spine mea kīloi paʻewa anuenue, ma hope i hele mai i ka torso a me ka'ūhā mua kaei. Ke kāohi fetal poo a me kona pā huli mai ia lŘlŘ kūpono kou poʻe. Ke poo Ua hānauʻia i loko o ka manao kūlana.

Biomechanism hanau wawae praevia mea like i ka mea ike i ka breech. Pinepine, ma hope o ka hookuuia ana o amniotic loli, a hiki hapa 'ana o ka cervix previa wāwae hiki ke kuu iho paha hoi haule mai o ka vagina. He nui complicates a hoopanee i ka holomua o ka hana. Once ka cervix ua maopopo hoikeia, pono ma hope o ka uha ikea lākou kīkala, a no laila, ma luna o biomechanisms i ka luna genera.

I hiki ke ike, biomechanism maoli ka nahunahu hanau hilinaʻi nui ma luna o ka oihana i loko o i o ka hua, a mai kaʻoi o ke kau i uea.